diff --git a/public/s/js/f0ckm.js b/public/s/js/f0ckm.js
index 7a3b548..4903ff0 100644
--- a/public/s/js/f0ckm.js
+++ b/public/s/js/f0ckm.js
@@ -4158,7 +4158,21 @@ window.cancelAnimFrame = (function () {
     "d": clickOnNavBinding("#next"),
     "r": clickOnElementBinding("#random, #nav-random"),
     "p": clickOnElementBinding("button#a_toggle"),
-    "f": clickOnElementBinding("#a_favo"),
+    "f": () => {
+      if (localStorage.getItem('fForFullscreen') === 'true') {
+        const fsBtn = document.querySelector('.v0ck_fs_btn');
+        const imgBtn = document.querySelector('.image-modal-btn');
+        if (fsBtn) {
+          fsBtn.click();
+        } else if (imgBtn) {
+          imgBtn.click();
+        } else {
+          clickOnElementBinding("#a_favo")();
+        }
+      } else {
+        clickOnElementBinding("#a_favo")();
+      }
+    },
     "i": clickOnElementBinding("a#a_addtag"),
     "l": () => window.toggleBackground(),
     "y": () => {
diff --git a/public/s/js/settings.js b/public/s/js/settings.js
index 4d73c6a..cef531e 100644
--- a/public/s/js/settings.js
+++ b/public/s/js/settings.js
@@ -755,6 +755,14 @@
         });
     }
 
+    const fForFullscreenToggle = document.getElementById('f_for_fullscreen_toggle');
+    if (fForFullscreenToggle) {
+        fForFullscreenToggle.checked = localStorage.getItem('fForFullscreen') === 'true';
+        fForFullscreenToggle.addEventListener('change', () => {
+            localStorage.setItem('fForFullscreen', fForFullscreenToggle.checked);
+        });
+    }
+
     // Granular Thumbnail Blur Toggles
     const blurNsfwToggle = document.getElementById('blur_nsfw_toggle');
     if (blurNsfwToggle) {
diff --git a/src/inc/locales/de.json b/src/inc/locales/de.json
index 63fd680..b5c02e8 100644
--- a/src/inc/locales/de.json
+++ b/src/inc/locales/de.json
@@ -154,6 +154,8 @@
     "alternative_infobox_hint": "Zeigt einen erweiterten Autor-Block mit Avatar und Bio auf Beitragsseiten",
     "alternative_steuerung": "Icon-Navigationsstil",
     "alternative_steuerung_hint": "Ersetzt die Text-Navigation (← zurück | Zufall | weiter →) durch kompakte Chevron-Icons",
+    "f_for_fullscreen": "F is for Fullscreen",
+    "f_for_fullscreen_hint": "Das Drücken von F schaltet das Vollbild im Videoplayer statt den Beitrag zu favorisieren.",
     "disable_autoplay": "Automatische Wiedergabe deaktivieren",
     "disable_autoplay_hint": "Verhindert die automatische Wiedergabe von Videos und Audio",
     "disable_swiping": "Wischen deaktivieren",
diff --git a/src/inc/locales/en.json b/src/inc/locales/en.json
index dba7a63..83f11bd 100644
--- a/src/inc/locales/en.json
+++ b/src/inc/locales/en.json
@@ -154,6 +154,8 @@
     "alternative_infobox_hint": "Show a rich author card with avatar and bio on item pages",
     "alternative_steuerung": "Icon nav style",
     "alternative_steuerung_hint": "Replace text navigation (← prev | random | next →) with compact chevron icons",
+    "f_for_fullscreen": "F is for Fullscreen",
+    "f_for_fullscreen_hint": "Pressing F will toggle fullscreen in the video player instead of favoriting the post.",
     "disable_autoplay": "Disable Autoplay",
     "disable_autoplay_hint": "Prevent videos and audio from playing automatically",
     "disable_swiping": "Disable Swiping",
diff --git a/src/inc/locales/nl.json b/src/inc/locales/nl.json
index 4cd4438..78da053 100644
--- a/src/inc/locales/nl.json
+++ b/src/inc/locales/nl.json
@@ -154,6 +154,8 @@
     "alternative_infobox_hint": "Toont een uitgebreide auteurkaart met avatar en bio op itempagina's",
     "alternative_steuerung": "Icoon-navigatiestijl",
     "alternative_steuerung_hint": "Vervangt tekstnavigatie (← terug | willekeurig | verder →) door compacte chevron-iconen",
+    "f_for_fullscreen": "F is for Fullscreen",
+    "f_for_fullscreen_hint": "Drukken op F schakelt het volledige scherm in de videospeler in plaats van de post te favorieten.",
     "disable_autoplay": "Automatisch afspelen uitschakelen",
     "disable_autoplay_hint": "Voorkomen dat video's en audio automatisch worden afgespeeld",
     "disable_swiping": "Swipen uitschakelen",
diff --git a/src/inc/locales/zange.json b/src/inc/locales/zange.json
index 823c44b..8a2e110 100644
--- a/src/inc/locales/zange.json
+++ b/src/inc/locales/zange.json
@@ -154,6 +154,8 @@
     "alternative_infobox_hint": "Zeigt einen erweiterten Autor-Block mit Avatar und Bio auf Beitragsseiten",
     "alternative_steuerung": "Icon-Navigationsstil",
     "alternative_steuerung_hint": "Ersetzt die Text-Navigation (← zurück | Zufall | weiter →) durch kompakte Chevron-Icons",
+    "f_for_fullscreen": "F is for Fullscreen",
+    "f_for_fullscreen_hint": "Das Drücken der F-Taste leitet die Vollbildlichkeit des Abspielers ein, statt den Pfosten zu favorisieren.",
     "disable_autoplay": "Automatische Wiedergabe deaktivieren",
     "disable_autoplay_hint": "Vermeiden Sie das automatische Abspielen von Videos und Tondateien",
     "disable_swiping": "Wischen deaktivieren",
diff --git a/views/settings.html b/views/settings.html
index 336ab7f..76187c0 100644
--- a/views/settings.html
+++ b/views/settings.html
@@ -222,6 +222,13 @@
             </label>
             <small class="text-muted" style="margin-left: 25px;">{{ t('settings.image_expand_on_click_hint') || 'Instead of opening the scroll zoom modal, clicking an image will expand it to full size within the page.' }}</small>
           </div>
+          <div class="setting-item" style="margin-bottom: 15px;">
+            <label for="f_for_fullscreen_toggle" style="cursor: pointer; display: flex; align-items: center; gap: 10px;">
+              <input type="checkbox" id="f_for_fullscreen_toggle">
+              <span>{{ t('settings.f_for_fullscreen') || 'F is for Fullscreen' }}</span>
+            </label>
+            <small class="text-muted" style="margin-left: 25px;">{{ t('settings.f_for_fullscreen_hint') || 'Pressing F will toggle fullscreen in the video player instead of favoriting the post.' }}</small>
+          </div>
           <div class="setting-item" style="margin-top: 15px;">
             <label for="disable_autoplay_toggle"
               style="cursor: pointer; display: flex; align-items: center; gap: 10px;">